A chemical catalyst is a substance that lowers the required activation energy of a reaction. The activation energy is the amount of energy required to activate or start a pr â¦ ocess, this can be in the form of many things, such as heat. catalyst accelerates the process of a chemical reaction. If a reaction is a slow one then by introducing a catalyst would speeden up the process. For example :- The reaction â¦ between hydrogen and nitrogen to create ammonia is a slow reaction. Finely divided iron act as a catalyst.
For other uses, see Boatswain (disambiguation). A boatswain (/ËboÊsÉn/, formerly and dialectally also /ËboÊtsweÉªn/), bo's'n, bos'n, or bosun, also known as a Petty Officer or a qualified member of the deck department, is the seniormost rate of the deck department and is responsible for the components of a ship's hull.
Pirate Talk for Crew, Names for Pirates-. 1  Boatswain-Often pronounced Bosun, this crew member was in charge of the deck, whether it be the crew, equipment, or activity on the deck. 2  Cockswain-Originally the Captain's attendant who would row him to and from the ship, later came to mean the helmsman.